I've never heard about this Tidex exchange.It's probably one of the smaller crypto exchange platforms.
However,this is a good move on their side.All crypto exchanges have to clean up the shitcoins,in order to build good reputation.I hope that more platfroms,like HitBTC or Tradeogre, will folow Tidex's example.
You can check coinmarketcap.com for the listing of Tidex Exchange. It is there and not that a small exchange as such.